Those shelves can be used in websites or in phone applications. You can have book icons placed on them and other stuff. Go ahead, just start designing your library based on this awesome psd freebie. In this particular psd shelves, you can find realistic style shadows and reflections of one shelf on the other. The whole design is placed on a nice dark brown background that fits with the wooden color and texture with the shelves. All designed and constructed with photoshop layer styles and the are all vector shapes that can be exported to ai or eps and then opened with a vector based program.
Enjoy